Multiple Choice
Which of the following is a single-layered, fluid-filled ball of cells?
A) cleavage
B) morula
C) gastrula
D) zygote
E) blastula
Correct Answer:

Verified
Correct Answer:
Verified
Q7: Gastrulation produces<br>A) hollow balls of cells.<br>B) embryos
Q9: In the process of blastula formation,<br>A)the size
Q12: Which of the following developmental events occurs
Q13: In frogs, the gray crescent appears<br>A)after the
Q15: A zygote is formed at this stage.<br>A)A<br>B)B<br>C)C<br>D)D<br>E)E
Q16: Organ formation is indicated by<br>A)A.<br>B)B.<br>C)C.<br>D)D.<br>E)E.
Q17: A zygote forms<br>A)as soon as a sperm
Q19: Muscles differentiate from which tissue?<br>A)ectoderm<br>B)endoderm<br>C)mesoderm<br>D)somatoderm<br>E)all of these
Q20: Which stage of development involves initial cellular
Q68: Which embryonic tissue is incorrectly associated with